2 * Copyright (c) 1982, 1986 The Regents of the University of California.
3 * Copyright (c) 1989, 1990 William Jolitz
4 * Copyright (c) 1994 John Dyson
7 * This code is derived from software contributed to Berkeley by
8 * the Systems Programming Group of the University of Utah Computer
9 * Science Department, and William Jolitz.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91
40 * Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$
44 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
45 * All rights reserved.
47 * Author: Chris G. Demetriou
49 * Permission to use, copy, modify and distribute this software and
50 * its documentation is hereby granted, provided that both the copyright
51 * notice and this permission notice appear in all copies of the
52 * software, derivative works or modified versions, and any portions
53 * thereof, and that both notices appear in supporting documentation.
55 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
56 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
57 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
59 * Carnegie Mellon requests users of this software to return to
61 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
62 * School of Computer Science
63 * Carnegie Mellon University
64 * Pittsburgh PA 15213-3890
66 * any improvements or extensions that they make and grant Carnegie the
67 * rights to redistribute these changes.
70 #include <sys/param.h>
71 #include <sys/systm.h>
74 #include <sys/malloc.h>
77 #include <sys/sysent.h>
78 #include <sys/vnode.h>
79 #include <sys/vmmeter.h>
80 #include <sys/kernel.h>
82 #include <sys/sf_buf.h>
83 #include <sys/sysctl.h>
84 #include <sys/unistd.h>
86 #include <machine/cpu.h>
87 #include <machine/fpu.h>
88 #include <machine/md_var.h>
89 #include <machine/pcb.h>
92 #include <vm/vm_param.h>
93 #include <vm/vm_kern.h>
94 #include <vm/vm_page.h>
95 #include <vm/vm_map.h>
96 #include <vm/vm_extern.h>
99 cpu_thread_exit(struct thread *td)
102 /* Throw away the high FP registers. */
103 ia64_highfp_drop(td);
107 cpu_thread_clean(struct thread *td)
112 cpu_thread_alloc(struct thread *td)
116 sp = td->td_kstack + td->td_kstack_pages * PAGE_SIZE;
117 sp -= sizeof(struct pcb);
118 td->td_pcb = (struct pcb *)sp;
119 sp -= sizeof(struct trapframe);
120 td->td_frame = (struct trapframe *)sp;
121 td->td_frame->tf_length = sizeof(struct trapframe);
125 cpu_thread_free(struct thread *td)
130 cpu_thread_swapin(struct thread *td)
135 cpu_thread_swapout(struct thread *td)
138 ia64_highfp_save(td);
142 cpu_set_syscall_retval(struct thread *td, int error)
145 struct trapframe *tf;
147 if (error == EJUSTRETURN)
153 * Save the "raw" error code in r10. We use this to handle
154 * syscall restarts (see do_ast()).
156 tf->tf_scratch.gr10 = error;
158 tf->tf_scratch.gr8 = td->td_retval[0];
159 tf->tf_scratch.gr9 = td->td_retval[1];
160 } else if (error != ERESTART) {
162 if (error < p->p_sysent->sv_errsize)
163 error = p->p_sysent->sv_errtbl[error];
165 * Translated error codes are returned in r8. User
167 tf->tf_scratch.gr8 = error;
172 cpu_set_upcall(struct thread *td, struct thread *td0)
175 struct trapframe *tf;
177 ia64_highfp_save(td0);
180 KASSERT(tf != NULL, ("foo"));
181 bcopy(td0->td_frame, tf, sizeof(*tf));
182 tf->tf_length = sizeof(struct trapframe);
183 tf->tf_flags = FRAME_SYSCALL;
184 tf->tf_special.ndirty = 0;
185 tf->tf_special.bspstore &= ~0x1ffUL;
186 tf->tf_scratch.gr8 = 0;
187 tf->tf_scratch.gr9 = 1;
188 tf->tf_scratch.gr10 = 0;
191 KASSERT(pcb != NULL, ("foo"));
192 bcopy(td0->td_pcb, pcb, sizeof(*pcb));
193 pcb->pcb_special.bspstore = td->td_kstack;
194 pcb->pcb_special.pfs = 0;
195 pcb->pcb_current_pmap = vmspace_pmap(td0->td_proc->p_vmspace);
196 pcb->pcb_special.sp = (uintptr_t)tf - 16;
197 pcb->pcb_special.rp = FDESC_FUNC(fork_trampoline);
198 cpu_set_fork_handler(td, (void (*)(void*))fork_return, td);
200 /* Setup to release the spin count in fork_exit(). */
201 td->td_md.md_spinlock_count = 1;
202 td->td_md.md_saved_intr = 1;
206 cpu_set_upcall_kse(struct thread *td, void (*entry)(void *), void *arg,
209 struct ia64_fdesc *fd;
210 struct trapframe *tf;
214 ndirty = tf->tf_special.ndirty + (tf->tf_special.bspstore & 0x1ffUL);
216 KASSERT((ndirty & ~PAGE_MASK) == 0,
217 ("Whoa there! We have more than 8KB of dirty registers!"));
219 fd = (struct ia64_fdesc *)entry;
220 sp = (uint64_t)stack->ss_sp;
222 bzero(&tf->tf_special, sizeof(tf->tf_special));
223 tf->tf_special.iip = fuword(&fd->func);
224 tf->tf_special.gp = fuword(&fd->gp);
225 tf->tf_special.sp = (sp + stack->ss_size - 16) & ~15;
226 tf->tf_special.rsc = 0xf;
227 tf->tf_special.fpsr = IA64_FPSR_DEFAULT;
228 tf->tf_special.psr = IA64_PSR_IC | IA64_PSR_I | IA64_PSR_IT |
229 IA64_PSR_DT | IA64_PSR_RT | IA64_PSR_DFH | IA64_PSR_BN |
232 if (tf->tf_flags & FRAME_SYSCALL) {
233 tf->tf_special.cfm = (3UL<<62) | (1UL<<7) | 1UL;
234 tf->tf_special.bspstore = sp + 8;
235 suword((caddr_t)sp, (uint64_t)arg);
237 tf->tf_special.cfm = (1UL<<63) | (1UL<<7) | 1UL;
238 tf->tf_special.bspstore = sp;
239 tf->tf_special.ndirty = 8;
240 sp = td->td_kstack + ndirty - 8;
241 if ((sp & 0x1ff) == 0x1f8) {
243 tf->tf_special.ndirty += 8;
246 *(uint64_t*)sp = (uint64_t)arg;
251 cpu_set_user_tls(struct thread *td, void *tls_base)
253 td->td_frame->tf_special.tp = (unsigned long)tls_base;
258 * Finish a fork operation, with process p2 nearly set up.
259 * Copy and update the pcb, set up the stack so that the child
260 * ready to run and return to user mode.
263 cpu_fork(struct thread *td1, struct proc *p2 __unused, struct thread *td2,
269 KASSERT(td1 == curthread || td1 == &thread0,
270 ("cpu_fork: td1 not curthread and not thread0"));
272 if ((flags & RFPROC) == 0)
276 * Save the preserved registers and the high FP registers in the
277 * PCB if we're the parent (ie td1 == curthread) so that we have
278 * a valid PCB. This also causes a RSE flush. We don't have to
279 * do that otherwise, because there wouldn't be anything important
282 if (td1 == curthread) {
283 if (savectx(td1->td_pcb) != 0)
284 panic("unexpected return from savectx()");
285 ia64_highfp_save(td1);
289 * create the child's kernel stack and backing store. We basicly
290 * create an image of the parent's stack and backing store and
291 * adjust where necessary.
293 stackp = (char *)(td2->td_kstack + td2->td_kstack_pages * PAGE_SIZE);
295 stackp -= sizeof(struct pcb);
296 td2->td_pcb = (struct pcb *)stackp;
297 bcopy(td1->td_pcb, td2->td_pcb, sizeof(struct pcb));
299 stackp -= sizeof(struct trapframe);
300 td2->td_frame = (struct trapframe *)stackp;
301 bcopy(td1->td_frame, td2->td_frame, sizeof(struct trapframe));
302 td2->td_frame->tf_length = sizeof(struct trapframe);
303 ndirty = td2->td_frame->tf_special.ndirty +
304 (td2->td_frame->tf_special.bspstore & 0x1ffUL);
305 bcopy((void*)td1->td_kstack, (void*)td2->td_kstack, ndirty);
307 /* Set-up the return values as expected by the fork() libc stub. */
308 if (td2->td_frame->tf_special.psr & IA64_PSR_IS) {
309 td2->td_frame->tf_scratch.gr8 = 0;
310 td2->td_frame->tf_scratch.gr10 = 1;
312 td2->td_frame->tf_scratch.gr8 = 0;
313 td2->td_frame->tf_scratch.gr9 = 1;
314 td2->td_frame->tf_scratch.gr10 = 0;
317 td2->td_pcb->pcb_special.bspstore = td2->td_kstack + ndirty;
318 td2->td_pcb->pcb_special.pfs = 0;
319 td2->td_pcb->pcb_current_pmap = vmspace_pmap(td2->td_proc->p_vmspace);
321 td2->td_pcb->pcb_special.sp = (uintptr_t)stackp - 16;
322 td2->td_pcb->pcb_special.rp = FDESC_FUNC(fork_trampoline);
323 cpu_set_fork_handler(td2, (void (*)(void*))fork_return, td2);
325 /* Setup to release the spin count in fork_exit(). */
326 td2->td_md.md_spinlock_count = 1;
327 td2->td_md.md_saved_intr = 1;
331 * Intercept the return address from a freshly forked process that has NOT
332 * been scheduled yet.
334 * This is needed to make kernel threads stay in kernel mode.
337 cpu_set_fork_handler(td, func, arg)
339 void (*func)(void *);
342 td->td_frame->tf_scratch.gr2 = (u_int64_t)func;
343 td->td_frame->tf_scratch.gr3 = (u_int64_t)arg;
347 * cpu_exit is called as the last action during exit.
348 * We drop the fp state (if we have it) and switch to a live one.
351 cpu_exit(struct thread *td)
356 * Allocate an sf_buf for the given vm_page. On this machine, however, there
357 * is no sf_buf object. Instead, an opaque pointer to the given vm_page is
361 sf_buf_alloc(struct vm_page *m, int pri)
364 return ((struct sf_buf *)m);
368 * Free the sf_buf. In fact, do nothing because there are no resources
369 * associated with the sf_buf.
372 sf_buf_free(struct sf_buf *sf)
377 * Software interrupt handler for queued VM system processing.
383 if (busdma_swi_pending != 0)